Fifth Fatality Linked to Legionnaires’ Disease Outbreak in Harlem

A fifth individual has died due to the ongoing outbreak of Legionnaires’ disease in Central Harlem, New York City health officials confirmed. This announcement was made by Dr. Michelle Morse, the acting health commissioner, on the evening of August 19, 2023. The deceased person, who passed away before mid-August, has been identified as part of the cluster of cases that has emerged since late July.

The outbreak began on July 25, with health authorities reporting a total of 108 confirmed cases as of August 19. Among these, 14 patients have required hospitalization. The affected area includes several ZIP codes—10027, 10030, 10035, 10037, and 10039—though officials maintain that the risk to residents in these communities remains low.

Legionnaires’ disease, a severe form of pneumonia, is caused by the Legionella bacteria, which thrive in warm water environments. Individuals can contract the disease by inhaling mist containing the bacteria, leading to flu-like symptoms that can escalate to severe complications. Symptoms typically develop within two to ten days after exposure.

According to data from the U.S. Centers for Disease Control and Prevention, between 8,000 and 18,000 individuals are hospitalized with Legionnaires’ disease each year in the United States. In New York City, the first confirmed case of this outbreak occurred on July 22, and the highest number of newly diagnosed cases reached 11 on August 2. Since then, the number of new cases has declined, with the last two cases reported on August 12.

Investigation and Remediation Efforts Continue

In light of the outbreak, the health department has undertaken extensive investigation and remediation efforts. Dr. Morse stated, “Based on epidemiological evidence, remediation efforts have been effective as new cases continue to decrease.” The health department is actively monitoring the situation and will inform affected buildings if additional treatments are necessary.

Samples of water from cooling towers in the area have been collected and tested as part of the investigation. While the city has not disclosed how many samples tested positive for the bacteria, officials indicated that those with initial positive results for Legionella have completed the treatment mandated by the health department.

The city’s health department reassured the public, stating, “We are continuing to monitor and let buildings know if additional treatment is needed.” As the investigation persists, the health department remains committed to ensuring the safety of Harlem residents and controlling the spread of the disease.